Freezing prevention issues for catalytic units after shutdown in winter
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After the catalytic unit is shut down, is it left idle for an entire winter? How can freezing be prevented during this period, especially in terms of protecting the external and internal heat exchangers? Should steam be used for circulation, or are there other methods?
To prevent freezing of the catalytic unit during shutdown periods, the following methods can be employed: 1. Circulating steam for heat retention: Using the thermal energy of steam to maintain the temperature inside the equipment and prevent freezing due to low temperatures. 2. Heating strip or electric heating: Install a heating strip outside the device or use an electric heater to maintain the device’s temperature. 3. Add antifreeze: Add an appropriate amount of antifreeze to the system to lower the freezing point of the cooling medium and prevent freezing. 4. Equipment evacuation: Completely empty the medium inside the equipment and replace it with air, in order to avoid problems caused by the freezing of liquid media. 5. Insulating materials: Add insulation layers to pipes and key components to reduce heat loss and prevent excessively low temperatures. Select an appropriate method based on the actual conditions, or combine multiple methods to ensure that the equipment survives the winter safely. .